Since seeing the MJK H-baffle projects on here, I have eventually found A 15"er will a reasonably high Qts:
Fane International Ltd Loud Speakers
Can anyone hazard a guess/speak from experience and give me some idea whether these drivers would be suitable or not.
Cheers folks.
Fane International Ltd Loud Speakers
Can anyone hazard a guess/speak from experience and give me some idea whether these drivers would be suitable or not.
Cheers folks.
Put it in a 16" x 16" H-frame, LP at 120 Hz Linkwitz-Riley 12 db/oct and it will behave like this:
meeting the fullranger at 300 Hz or just a little above.
/Erling
An externally hosted image should be here but it was not working when we last tested it.
meeting the fullranger at 300 Hz or just a little above.
/Erling
I used to run a pair of Selenium 15PW3-SLF on OB, which is a similar driver. Worked well, as long as you cross low to fight the rising response that OB gives you. The slightly higher Q of the Fane and an H frame will help that.
Erling has given you a good lead with his 120Hz LP choice.
I agree with that for sure Pano......i can think of a multitude of fullrangers to go with that at around 83-87dB, AND possibly allow a bit of baffle step correction around the x-over point.
The only problem that remains is my small L shaped listening room.....lol
Hey Skorpion, so long as you're feeling generous, any chance you could sim the eminence beta 15 in a U-frame?
+1... Please!
@ Pano; I think I see what you're getting at...
Im also assuming that the sim does not simulate ACTUAL frequency response, as I dont think the frd is used....although that IS just an assumption. That being the case any response bumps and dips between 100 and 500hz or so are going to alter things a little, if theyre significant enough.
So im expecting a little adjustment here and there.
Im also assuming that the sim does not simulate ACTUAL frequency response, as I dont think the frd is used....although that IS just an assumption. That being the case any response bumps and dips between 100 and 500hz or so are going to alter things a little, if theyre significant enough.
So im expecting a little adjustment here and there.
The graph is a simulation, but is a good guide to what you will get. O.B. crossovers are NOT like box crossovers. It can take some time to really learn that. One of the things you'll notice in well designed OBs is the lower than normal Low Pass filter. It is electrically low so the that acoustic response ends up flat. Otherwise the OB losses leave you with no bass and too much mid. You can lose as much as 10dB doing this trick, that's the trade off.
There are other tricks to OB crossovers, but that's the main one.
There are other tricks to OB crossovers, but that's the main one.
Around 87 db sensitivity for the fullrange should match the 15" Fane, if you choose the crossover frequence as mentioned. It's not necessary to choose a fullrange with higher sensitivity, because then you'll have to damp this further.
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If the driver is of decent quality, the .frd file should be fairly smooth over this limited low frequency range. Anomolies in the response due to room influences will swamp any small bumps and dips in the driver's .frd curves.
Martin
im assuming the frame is
16*16*16 in the h frame, and 16*16*7.5 in the u frame, am i correct?
ok this seems to point to the triplet of w2-800 with sens ~87dB FOR H FRAME, and perhaps the alpair for a u frame...
Interesting...thanks guys. The only doubt i have is monopole mid-hf with ob bass.
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